Electrical precipitation



June 24, 1930.

H. A. WINTERMUTE El AL 1,766,421

ELECTRICAL PRECIPITATION Filed April 19, 1926 E" 1.

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ATTORNEYS;

Patented June 24, 1930 HARRY A. WINTERMUTE, OF NEW YORK,

BERG, OF MIDDLESEX BOROUGH, NEW

N. Y., AND CARL WILLIAM JULIUS HED- J'ERSEY, ASSIGNORS TO RESEARCH CORPO- RATION, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK ELECTRICAL PRECIPITATION Application filed April 19,

This invention relates to electric precipitation and more particularly to means and ways for controlling the distribution of the gas through different parts of a treater.

The importance of the distribution of the gas through the different parts of a treater has been long recognized and various arrangements have been proposed in the past for effecting substantially uniform distribution.

It is the object of our invention to provide a simple arrangement which may be readily applied independently of the particular construction of the precipitator proper, may be readily adjusted to suit particular requirements, and is cheap.

The invention, the principle upon which it is based, and the advantages resulting therefrom may be fully understood in connection with the accompanying drawings in which Fig. 1 is a fragmentary section of an electric precipitator embodying the invention; ig. 2 is a similar section at rightangle thereto;

Fig. 3 is detail; and

Fig. at is thereof.

In the drawings 1 represents a plurality of vertical plates defining collecting electrodes. The interspaces 2 between the collecting electrodes serve as gas passages. A plurality of discharge electrodes 3 are suspended from a support 4 and are disposed centrally in the passages 2, parallel to the plates 1. The construction just described represents a well known type of precipitator. While the invention is particularly well adapted for this type of precipitator,- it is by no means to be understood that it is limited thereto.

From the support 4 are suspended a plurality of bafile plates 5, as for instance by a plan view of the most important a plan View of a modification This absolute characteristic, but is assumption that in the particular instance the highest rate of gas flow is at the center and that the rate of gas fiow decreases toward the marginal portions. The center of relative rates of 1926. Serial No. 103,135.

the baflle plate has been depressed to vary the distance between it and the orifice defined by the upper end of the corresponding gas passage. The plate has a varying restricting effect upon the gas flow and this effect is the greater, the closer it is to the end of the passage. By curving the plate, dif ferent parts thereof have a different restrict ing effect, decreasing in the particular instance from the center outwardly or increas ing from the lateral portions inwardly toward the center. The particular form to be given to the plate depends entirely on the gas flow in the different parts of the passages in any particular precipitator. By appropriately adjusting the curvature of the baffle plate, the restrictive effect thereof may be graded to produce a gas flow which is substantially uniform at all points of the cross-sectional area of the gas passages.

The object of the invention may also be attained by varying the shape of the baffle in other respects. Thus, as indicated in Fig. 4, the baflie may have a varying width. The form shown, again, is based upon the assumption that the rate of flow is greatest at the center and decreases toward the margins. The difference in the width may be made proportional to the difference in the rates of gas flow in the different regions of the gas passage. It may be advantageous to combine the two effects produced by a varying width and by a varying distance from the ends of the gas passages, as is readily understood.

The function of the baffle, whatever its shape and position, is to restrictively affect the gas flow from the different parts of the ends of the gas passages defined by the collecting electrodes to the outlets 7' so as to cause a decrease in the rate of flow where it would normally be relatively high and a corresponding increase where it would normally be relatively low.

The baffles may be made of conductive or non-conductive material. TheV may be made from light, flexible material facilitating bending to the desired form. They may be made of very cheap material, and, if necessary, treated to make them resistive against various influences. The expense both as to manufacture and installation is small as compared with most of the difierent arrangements previously resorted to. The treater construction may be carried out without regard to the question of gas distribution and thus may be reduced to its simplest and most practical form.

Another practically important advantage of the arrangement is its disposition on the discharge electrode system. The cleaning of the collecting electrode may be carried out without obstruction or interference.

It is to be understood that the invention may be applied to various forms of precipitators. It is immaterial whether the discharge electrodes are disposed parallel to or at right angle to the gas ow, or whether the gas flow is Vertical or horizontal.

We claim:

1. In an electric precipitator, the combination with collecting electrodes defining a gas passage therebetween, and a discharge electrode extending into the said gas passage, of a bailie plate disposed exterior of and opposite to one end of the passage and formed to have a varying restrictive effect upon the gas flow in said passage at diflerent points in a plane extending transversely of said passage.

2. In an electric precipitator, the combination with collecting electrodes defining a gas passage therebetween and a discharge electrode extending into said passage, of a baflie plate disposed exterior of and opposite one end of the said passage so that different points of the plate are differently spaced from the end of the passage.

3. In an electric precipitator, the combination with collecting electrodes defining a gas passage therebetween of a bafl'le plate disposed opposite one end of the said gas passage, the width of the baflle plate varying intermediate its ends to equalize the gas flow at different points in a plane extending transverselIy of said passage. 4. 11 an electric precipitator including collecting electrode plates in parallel arrangement, defining gas passages therebetween, discharge electrodes extending into the said passages and means for supporting the discharge electrodes, of baflie plates supported from said supporting means and disposed opposite the outlet ends of said passages, the plates being formed to have different restrictive effects upon the gas flow at different points in a plane extending transversely of each passage.

5. In an electric precipitator, the combination with collecting electrodes defining gas passageways therebetween, and a discharge electrode disposed in each passageway, of stationary baflles cooperating with said passageways and adjacent one end thereof for equalizing the gas flow at difierent points in a plane extending transversely of said passageways.

6. In an apparatus for the electrical treatment of gases, transverse cross-section, a discharge electrode therein, and bafiling means spaced from one end of the walls of the passage for equalizing transversely of said passa e the flow of gas longitudinally through sai passage.

7. Apparatus for the electrical precipitation of suspended particles from gases comprising a plurality of spaced plate-like collecting electrodes forming a transversel elongated passage, a discharge electro e within said passage,-and means for equalizing the gas flow at diflerent points in a plane extending transversely of said passage.

8. Apparatus for the electrical precipitation of suspended particles from gases comprising a plurality of plate collecting electrodes forming a plurality of transversely elongated gas passages, discharge electrodes in said passages, and means for equalizing the gas flow at different points in planes extending transversely of said passages.

In testimony whereof, we aflix our signatures.

HARRY A. WINTERMUTE. CARL W. J. HEDBERG.

a passage of rectangular 

